TiC Reinforcement Composite Coating Produced Using Graphite of the Cast Iron by Laser CladdingReportar como inadecuado


TiC Reinforcement Composite Coating Produced Using Graphite of the Cast Iron by Laser Cladding


TiC Reinforcement Composite Coating Produced Using Graphite of the Cast Iron by Laser Cladding - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China





*

Author to whom correspondence should be addressed.



Academic Editor: Javier Narciso

Abstract In this study, a TiC-reinforced composite coating was produced to improve the wear resistance of a pearlite matrix grey iron using a pre-placed Ti powder by laser cladding. Results of scanning electron microscopy SEM, X-ray diffractometer XRD, and energy dispersive X-ray spectroscopy EDS confirmed that the coating was composed of TiC particles and two kinds of α-Fe phase. The fine TiC particles were only a few microns in size and uniformly distributed on the matrix phase in the composite coating. The microstructure characteristic of the composite coating resulted in the microhardness rising to about 1000 HV0.3 China GB-T 4342-1991 and the wear resistance significantly increased relative to the substrate. In addition, the fine and homogeneous solidification microstructure without graphite phase in the transition zone led to a good metallurgical bonding and transition between the coating and the substrate. It was of great significance for the cast iron to modify the surface and repair surface defects or surface damage. View Full-Text

Keywords: laser cladding; microstructure; wear resistance; composite coating; cast iron laser cladding; microstructure; wear resistance; composite coating; cast iron





Autor: Yanhui Liu * , Weicheng Qu and Yu Su

Fuente: http://mdpi.com/



DESCARGAR PDF




Documentos relacionados